One of my two screens stays off after coming from standby - OSx 10.10.2 MacMini

When 'reviving' my macmini after not using it for a while one of my screens stays black (The screen stays off so there is no contact from the mac). Even after logging in again the screen stays black.
I can get it to work again by disconnecting both screens and plugging them back in, but that is not a real solution of course. Also, after switching the position of the screens the other screen stays off, so the problem should be in the connection.
I've got a relatively new MacMini with OSx 10.10.2 and have the two screens (same size but not identical) attached via two 'mini displayport to DVI adapters'.
Does anyone have any idea what can cause this?

Hi Snery,
Welcome to the Apple Support Communities!
I know you have already started some troubleshooting for this situation where your second monitor is not connecting when you wake your Mac mini from sleep. To continue this troubleshooting process, I would suggest reading over and working through the steps in the attached article to help isolate and resolve this issue.
Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
Best regards,
Joe

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One of my two screens stays off after coming from standby - OSx 10.10.2 MacMini

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